Piston-packing.



H. M.,VASCONCELLOS.

PISTON PACKING. v APmcAnoN FILED JULY 2.. |9|a.'

1,287,527. Patented Dec 10, 1918.

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UNITED STATES PATENT QFFICE.

HOWARD M. VASGONCELLOS, 0F SPOKANE, WASHINGTON.

PISTON-PACKING.

Application filed July 2, 1918.

To all whom it may concern:

Be it known that I, HOWARD M. VASCON- CELLOS, a citizen of the United States, residing at Spokane, in the county of Spokane and State of Washington, have invented certain new and useful Improvements in Piston-Packing, of which the following is a specification.

The present invention relates to improvements in piston packing, especially applicable for use in bearings or reciprocating pistons for locomotives, and other en: gines, and for use in valve packings, etc. The primary object of the invention is the provision of a packing ring which is used in groups in piston bearings, and arranged in staggered relation to prevent leakage through the rings, and for providing, es pecially, a comparatively inexpensive, but eflicient take up ring as will be hereinafter described and claimed.

In the accompanying drawings one complete example of the physical embodiment of the invention is illustrated according to the best mode so far devised for the practical application of-the principles of the invention.

Figure 1 is a plan view of one of the rings made according to the invention.

Fig. 2 is'an edge view of the ring.

Fig. 3 is a perspective view of one end of one of the spring-attaching bands.

Fig. 4 is .a transverse section at line 4& of Fig. 1.

Fig. 5 is a transverse section at line 5-5 of Fig. 1.

The rings are preferably cast metal in bar shape, and made up of two circular sec tions 1 and 2, each of which is formed with a plane face as 3, 3, 4, 4, and these faces lie in parallelism and frictional contact on lines tangential with the inner periphery of the ring that is formed by the two segments or sections, thus forming smooth slidable joints so that as the inner periphery of the packing ring is worn away, the wear is compensated for by this take up of the ring.

Specification of Letters Patent.

Patented Dec. 10, 1918.

Serial No. 243,026.

The two sections are held in close frictional contact with the piston which they surround by suitable instrumentalities as follows. On the outer periphery of each section, near the plane faces, is located a lug as 5, and 6, integral with the section and projecting a suitable distance therefrom, and from each lug, back toward the opposite end of the section, extends a thin metal band, as 8 or 9, both of the bands being cast in the metal sections and embedded just below the surface of the outer perimeter of the sections. Preferably the bands have openings as 8 through which the molten metal passes when the rings are cast, to hold the bands rigidly against displacement, and each band is provided with an end hook as 10, or 11. The adjoining hooks of the pairsof bands are connected by springs, twoin number, as 12, '13, one end of each spring being attached at the lug on the section, and the other end of the spring attached to the hook of the band that projects slightly from the periphery of the section.

The ring sections are shown as rectangular in cross-section, the bands being shown clearly in Figs. 4 and 5, as incased within the cast metal bars, and the integral anchoring lugs for the hooks are preferably narrower than the width of the ring. As the inside of the ring is worn away from friction it is apparent that the springs will draw the ring sections closer together to compensate for wear, thus holding the rings at all times in close frictional contact with the piston or valve stem as the case may be.

I claim A piston packing ring comprised of cast metal circular sections forming a broken ring, and each section having an integral, outer lug, a metal band incased in the cast sections and each band formed with end hooks one of which projects from one of said lugs, and a pair of contractile springs connecting the adjoining ends of the bands.

In testimony whereof I affix my signature.

HOWARD M. VASCON'CELLOS.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Estonia, Washington, D. G. 

